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Check the air supply pressure. The set point pressure should be 1.5 bar. When the oxygen
concentrator is running, the pressure typically cycles from 1.5 bar to 0.9 bar. Check the O2
PRESSURE SENSOR in O2-Controller Status menu. The pressure should be between 390 mbar
and 400 mbar at the idle 1 l/h “Mass Flow Controller” MFC FLOW. At 60 l/h MFC SETPOINT flow,
the pressure should not be less than 320 mbar. See Section 8.1.6 Oxygen Controller Status
for details.
Oxygen Purity Test: Power up the system for at least 10 minutes before the oxygen purity test is
carried out. Using the Simulate menu (see Section 8.1.2 Simulate) set the MFC (see figure 2 and
table 2 in Section 4.1.1 Analysis Enclosure) flow to 10 l/h and flow oxygen gas through the CO
2
analyzer for 5 minutes. At the end of this period, the CO
2
analyzer zero reading (ppm CO2) should
be typically within ±0.5% of full scale of the CO
2
analyzer range. For instance, if the CO
2
analyzer
range is 10000ppm, then the CO
2
analyzer zero reading should be typically within ±50ppm.
(If the CO
2
analyzer zero reading is outside the specifications, confirm that there is no CO
2
in the oxygen gas
by connecting the CO
2
filter “used with the sodium hydroxide reagent container” between the Cooler and CO
2
analyzer inlet port and set the MFC to 10 l/h. As the size of the CO
2
filter is small, keep the 10 l/h gas flow
running for at least for 5 minutes and record the CO
2
zero readings at the end of the 5 minute period. If the
CO
2
zero readings do not drop significantly with the CO
2
filter in place, this will indicate that there is no CO
2
contamination in the oxygen supply.)
3. PUMP TESTS:
Caution! Below procedures involves handling strong acid and base reagents. Necessary safety precautions,
such as wearing eye protection and gloves, should be taken throughout these tests.
Go to Zero Calibration menu and select RUN REAGENTS PURGE function to prime the pumps.
The factory Reagents Purge settings to prime reagents typically cover ~3 meters distance
between the reagent containers and the BioTector. If it is necessary to increase the reagent purge
times, see section 8.3.4.5 Reagents Purge for details.
Remove the nut at the T fitting located between the Mixer Reactor and the Sample Out Valve. See
figure 4 in Section 4.2.2 BioTector Sample Injection for details. Place a small container under the
reactor and place the open end of the tubing coming from the reactor into the container to capture
any possible liquid discharged. Confirm the Acid Pump is pumping correctly by using a 10ml
graduated cylinder placed under the open end of the T fitting. Activate the Acid Valve and run the
Acid Pump in Simulate menu. Acid Pump rate for SR25 Pump at 20 pulses should be between
3.9ml and 4.9ml in ~13 seconds. (Depending on the quantity of the liquid injected into the reactor and due
to an internal system interlock, the system may request the activation of Reactor Purge cycle to purge any
excess liquid from the reactor. If necessary run “REACTOR PURGE” function in the same menu.)
Confirm the Base Pump is pumping correctly. Activate the Base Valve and run the Base Pump in
Simulate menu. Base Pump rate for SR25 Pump at 20 pulses should be between 3.9ml and 4.9ml
in ~13 seconds. Reconnect the tubing and the fitting.
Important Note: For the correct operation of the system, the measured Acid and Base Pump rates must be
identical or similar. The maximum allowable difference in the measured volumes for acid and base injections
above should not be more than 0.2ml.
Confirm the WMM60 Sample Pump is pumping correctly. The pump rate at 16 pulses should be
between 5.5ml and 7.5ml in ~8 seconds. (Any variation between these pumped volumes is corrected
when the zero and span calibration is carried out.)
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